Porcelain socket.



Patented J Zl/z'nesses sleeve, adaplxad to rceive either stem, 41, of a keysocket-nnit, 5, ll, of a. pull-unit, The interior the sleeve, 1, is also preffi eralily provided with longitudinal grooves, 8, adantcd to receive lugs or ribs, 9, on the "porcelain base of a l-iUF/lcFJS-ll'llt l, or similar lugs or 4, 11,, on the keyaanit, 01-12 on the nan-unit to prevent relative rotation between the casing and the casinginclosed-unit.

For most uses in practice, relative r0tation lietwe 1e 11g and either the kcyint ided to be used only the slot, 3, may be omit-- with longitudina grooves, 13, and has on its so 3111181 end lug overhanging the respective grower, 13:, and provided with apertnres adapted to receive the respective fas tcning screw-7s, 15, said grooves, 13, being of a depth adapted to receive more or less of said iaste mung "the heads of A or the cap, 53, is presided and 'as'ii fi apertures, 17, ex

' "1 active recesses, 16,

c"? the capo Located i l J, is nulrplate, 18, pro n .1 sci "\V lllllfllldflll 211.7%!" tare ill) zmaptcd t0 receiro the neighboring ilt'astening s-rirl nnt-platc, 18; is held s :em 4.

tending through t t by means of tes 18, Have been firmly 2, by tightly setting up l'llQ. screws, ill), the enter ends of the apertures, 1?, are sealed up with pitch or cement making the nut-plates,18,a permanent part of the cap, and the easing-members are separated and seeured together, as occasion de mands, by manipulation of the exteriorly accessible fastening screws, 15, which serve to firmly secure together the casingqnembers, While permitting the casing-members to be readily separate-d or secured together Without the introduction of a screw-l river or otli i.

.ei'itral apv the eve; largcznent By the use cl? erturcd lu I i-l. I am able to riorly ac undue ire th market.

"The

exterior the sine e, l, is prm rably v with one or more 7 iiiieral flanges, one of which extends across or a cut to the outer end of the 13, said flange a1 Ll the overhanging lugs, 1st, serving to J.'w i..1:torce the sleeve and to compensate for any tendency to Weakness due to the presence or the grooves, l3,

In the preferred form oi my invention as illustrated, the grooves, 13 are provided 'ithont any detra civic-n from the space Withie slncve, and by forming the cap, 2 with I am able to extend the lint-plates, cooperate with the screws, l5 sorted in line with the grooves, 13, in

'..';li minimrmi external. en-

can.

Another re alt my i'di tion that it enables in 1':

pectivc grooves,

arovcd construe "melts the casin e s s shown. in eable in the iole to employ oantings for ed. units such, Ii." ex: Figs 7, 8 and. 9, lllllliiClll sleeve 1, and In interchangeable err porcelain sockets Willi :ntiall]; the same COHVLJUGIIL nd iacility as mare-rotors has been the case with illfitfll'fll fi, sockets def nossi- T by lietters L An includes casing ha imp-so :lrc'tcomp alerial, v .A with an fili'tlillfll er'rure; r v inserted tln'o cites riorly opcn erture in sat. one easing member with head accessible from the outer side oi said mentor; a nut carried by the other Cl,SililQ,'-I111llDi in engagement with said screw, and. means inserted through open aperture in said other casingmember for securing said nut thereto.

2. A casing for incandescent electric lampsockets comprising in combination a rigld sleeve of molded insulating material provided in its external periphery with a longitudinal groove and having on its inner end an apertured lug projecting across one end of said groove; :1 cap adapted to be secured upon sald inner end the sleeve, said cap having a lug overlying said lug 0n the slow; nnt-plate secured to the inner side Silk of said cap and ' haw her suntc seat usmbsr,

ma I

al'tum dap I UB3 m the lug serted t 

